Crucible.



CRUCIIBL'JJ.

1 9 107mm may, concern:

t 1, JOHN J. Bocmonn, a i etl S t s, residing at county of l ontgomer v and 'is rlvanic, have invented cerl l'n'innovenients in Cmc is specifiiticn to ecu: 1* out metal rectum i; any objects one nevi- Vl an improved separable crucible of e onoiiical cc ti'u '"on the but clown when the 1e crucible senaratecl. n ce foregoing to et ner with such other ob hereinafter appear or are i vention, I attain by means of tion which E liave shown in c in in time accompanying citeson on a portetion of the a section --lll of slicpe -=:tion is simple ecomble llacl': Ting Oil lniiclzs 7 set on Factory brick m clamnctl t g :Tljj or lie? 8. the emls r; r by me 2} which a [lmwnto nut ancl bolts azul collars are nreferably entice I c e'iei to use t i A v nrce cl Specification of Letters Patent.

' iication iical July $20, 1915, Serial 1E0. 851,888.

Renewed June 29, 1918. Serial 1%. 242,662.

like members B merely placed one on top of the other; but it is obvious that any number of rings may be employed, depending upon the character of the WOllQ to be clone. The bottom member rests upon a metal plate 12 carried on the truck C.

After tne parts of the crucible have been assembled it is desirable to provicle a re tractory lining 13 not only to prevent waste, but also to prevent the metal from adhering to the bricks, which would prevent the seneration of the rings To accomplish this, the refractory lining slioulcl 3e capable of witlistanclii j high temperatures Without disintegrating. ancl must at the same time be capable of being ea ly broken down when the rings are successively lifted off. In other Words the lining is a temporary, destructible one, suilicientl y cohesive ancl refractory to witlistaucl, for example a metal reduction operation or some similar metallurgical or metal founding operation. I prefer to use refractory lining ma le in accordance with the methods described in my co-pencling' application, Serial No, 851.887, filed .luly 20, 1914.

The advantages of my invention may be best shown by a specific example of its use. In reducing the rarer metals from compounds by the alumino-thermic method, tile compounds fill-Tl aluminum in some "form are mixerl. placccl in a crucible and the reaction imlucctl by iting a portion of the mass, from which s ircarls to the entire fitter the reduction is completed and the metal aml sla have solidified. the rings a (it ictible lining), may be in one alter the other, after which and the "m tal can be removed by a l at some suitable place. arts oi the c1 ucible are then rea sem- (i moved to a point whole it may be re lflifl. anal the operation repeated,

it will be seen from the foregoing that the rncible is simple and economical in con strnction, and lasting in character, and that it is arla'ptecl for a variety of uses. By virtue of its separable character, it facilitates the handling of the contents, end it is so simple til '0 a novice can assemble or sepac1aim:- In iesiimmy whereof I haw hereunto A crucible for use in mam} foundtg epersigned my name in the presence of the twa ations and i312 lik cramlmsed separable subscribed Witnesses. members 11251 1 z'tinuous, refracer g fri- JOHN J. able liuing tha 1 pennit'ting of ready messes:

para-ion @f members to expose the L.A.M2312$,

SYNNESTVEDT, 

